Lacto-fermenting red radish: 2.50% salt, 5.0days at 68 °F
Small red globe radishes ferment quickly and tint the brine a vivid pink. Their high water content and thin skins mean they sour in under a week, developing a mellow, slightly fizzy bite far gentler than raw radish. A common quick component in mixed-vegetable ferments and Korean-style banchan.
Salt calculator
Enter your vegetable weight and a salt percentage. We return the exact salt mass in grams, plus teaspoons for each common grain.
grams
%
Grain matters: one teaspoon of Diamond Crystal weighs half as much as one teaspoon of fine sea salt. Weigh in grams when you can.
All salt grains
Grain
Grams
Teaspoons
Tablespoons
Diamond Crystal kosher
25 g
8.8
2.93
Morton kosher
25 g
5.21
1.74
Fine sea salt
25 g
4.39
1.46
Pickling / canning
25 g
4.55
1.52
Default salt
2.50 %
Salt range
2.00% – 3.00%
Time @ 68 °F
5.0 days
Target pH
3.60
Water content
~95%
Preferred styles
brine pickle, lacto ferment, kimchi component
Technique
Trim and halve or quarter larger radishes; leave small ones whole. Pack into a jar and cover with a 2.5% salt brine (25g salt per liter). Weigh below the brine and ferment 3-7 days at 65-72°F — taste from day 3. Refrigerate once pleasantly sour to keep the snap.
2.50% by weight is the default for red radish (workable range 2.00%–3.00%). For 1000g red radish, that's 25.0g salt. Use non-iodised salt and weigh in grams — teaspoon equivalences vary by salt grain. Source: NCHFP (UGA) — fermented brine-pickle method.
How long to ferment red radish?
5.0 days at 68°F (20°C). Cooler kitchens (60-65°F) slow fermentation; warmer kitchens (75-80°F) roughly halve the time per 10°F increase. Start tasting from day 5; target pH 3.60 or below indicates complete primary fermentation.
What's the best technique for fermenting red radish?
Trim and halve or quarter larger radishes; leave small ones whole. Pack into a jar and cover with a 2.5% salt brine (25g salt per liter). Weigh below the brine and ferment 3-7 days at 65-72°F — taste from day 3. Refrigerate once pleasantly sour to keep the snap.
What category is red radish for fermentation?
Red Radish is a root vegetable. Small red globe radishes ferment quickly and tint the brine a vivid pink. Their high water content and thin skins mean they sour in under a week, developing a mellow, slightly fizzy bite far gentler t… Preferred fermentation style: brine-pickle, lacto-ferment, kimchi-component.
The kit for fermenting Red Radish
A short, honest kit for lacto-fermentation. The scale is the one that matters most — everything here is by weight.
Digital kitchen scale (0.1 g)Salt % is by weight, not volume — a 0.1 g scale is what makes the math above accurate.View on Amazon →
Glass fermentation weightsKeep vegetables submerged under the brine line so they ferment safely without mould.View on Amazon →
Airlock fermentation lidsLet CO₂ escape while keeping oxygen out — wide-mouth lids that fit standard jars.View on Amazon →
Wide-mouth mason jarsThe workhorse vessel for kraut, kimchi and brine pickles — 1 qt and ½ gal sizes.View on Amazon →
Pickling / fine sea saltPure salt with no iodine or anti-caking agents, which can cloud brine and inhibit fermentation.View on Amazon →
Stoneware fermentation crockFor scaling past the jar — a water-sealed crock for 5 L+ batches with built-in weights.View on Amazon →
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